ZL40264 Four Output Fanout Buffer Microsemi / Microchip ZL40264 Four Output Fanout Buffer is part of a family of high-performance, ultra-low jitter, and low power PCIe Gen 1 to 5, Intel QPI fanout buffers with individual output enable pins. Using the 4 output ZL40264 and utilizing the individual output pin, you can create hot-swappable PCIe clock trees. Microsemi / Microchip ZL40264 Four Output Fanout Buffer is ideal for PCI Express generation 1/2/3/4/5 clock distribution, Intel QPI, and UPI distribution, servers, storage and data centers, switches, and routers.